Feeding and forming box machine



Dec.'25, 1928.

L.'E. LA BOMBARD ET AL FEEDING AND FORMING BOX momma 2. Sheets-Sheet v l Filed Jan. 29, 1926 Dec. 2 5, 1928; 1,696,204

' L. E. LA BOMBARD ET AL FEEDING AND FORMING BOX MACHINE Fild Jan. 29. 1926 2 Sheets-Sheet 2 I H 1 T l O 26 O l 5 26 U5 fllzzveiai'a [J lean, lifizafionzzar i 24 mum) if. SicZeZodfiaauL JWM Patented Dec. 25, 1928.

UNITED STATES 1,696,204 PATENT OFFICE.

- LEON E. LA BOMBARD AND MELVIN H. SIDEBOTHAM, OF CHELSEA, MASSACHUSETTS,

ASSIGNORS T SPECIALTY AUTOMATIC MACHINE COMPANY, OF CHELSEA, MASSA- CHUSETTS, A CORPORATION OF MASSACHUSETTS.

FEEDING AND FORMING BOX MACHINE.

Application filed January 29, 1926. Serial No. 84,572.

This invention relates to the production of cylindrical or tubular articles, such as paper boxes and paper cans, and refers particularly to the production of such articles having end disk closures.

The object of the invention is to produce such articles at high speed and in an economical manner, especially with the bodies or cylindrical portions accurately formed.

With said object in view, the invention consists in the construction and combination of parts substantially as hereinafter described and claimed. 1

Of the accompanying drawings:

Figure 1 is a side elevation, partly broken out, ofso much of the machine as is necessary to illustrate the invention.

Figure 2 is an elevation from the right of Figure 1, on asmaller scale, and "omitting '20 some portions of the machine.

Figure 3 is a view similar to a portion of Figure 1, on a larger scale to better illustrate some of the details.

Figure 4 is a view looking in the direction of the arrow 4 at the right of Figure 3.

Figure 5 is a detail plan view hereinafter referred to.

' Figure 6 is a perspective view of a paper receptaclemade by the machine.

Similar reference characters designate similar parts or features in all of the views.

1.2 represents a base plate supporting the other portions of the machine, including side walls 13'. "Supported by the side walls 13 is a hopper 14 for a pile of the blanks or strips indicated at a (Fig. 1), said hopper having a front wall or gate strip 15, belowwhich,

and suitably spaced therefrom, is a feed wheel 16. Another feed wheel 17 may be employed, if desired.

Extending .forward'from' the side wall 14 i of the hopper and preferably integral therewith is a side guide.18. The bottom member or floor 19 of the hopper extends forward nearly as far as the side guide 18 and is formed with suitable slots or openings for the operation of the feed wheels. It also has an opening 20 for the roll 21, which acts as an auxiliary feed ,for. the strips a fed from the hopper.

Mounted on a cross bar or pin 22 is an arm 23, carrying a pin 24 on which a roll 25 is mounted (Figs. ;1 and 5).

Also mounted'on the pivot pin 22 is an arm 26 (Figs. 1, 3 and 5), having a slotted plate 27. Secured to the plate 27 and projecting down through slots 28 thereof, are fingers 29, preferably resilient.

Each bottom blank an advanced from the hopper, is forwarded by the auxiliary feed roll 21 over the glueapplying device, which consists of a disc 30 carried by a shaft 31, said shaft having also an arm provided with a transverse gluing pad 32. This compound gluing device receives glue from a roll 33 mounted to rotate in a glue pct 34, a suitable scrzgper for the glue roll being provided at The rotary members so far described, are connected by suitable gearing, not necessary to illustrate in detail, so that they will perform 'theiroperations, the glue roll 33 transferring glue to the disc 30 and to the pad 32 so that during each revolution of the shaft 31, thedisc 30 will apply a stripe of glue along one edge of the blank a while the pad 32 will apply a transverse area of glue to the under surface of the rear edge of the blank a passing over it.

Mounted on the side guide 18 (Figs. 1, 3 and 4), is a slide 36 connected by alink 37 with a lever 38,'which is actuated by'any' suitable means to reciprocate the slide 36 the proper distance.

Depending from the forward end of the slide 36, is a/bracket or lug 39 to which is pivoted at 40 the hub 41 of a pushing blade 42 which moves along the long slot illustrated in Figure 5 as formed in the arm 26 and plate 27. Projecting from the upper side of the hub 41 is a'liig 43, adapted'to contact, when the slide moves rearwardly to the position indicated in Figures 1 and 3, with a fixed stop 44 projecting from the side ide 18. Projectin from the lug 39 is a small stop pin 45. spring 43 connected to a pin 41' of the hub 41, tends to hold the lug 43 in contact with the fixed stop 44, when the slide is in its rearward position so that the pushing blade 42 will be swungsomewhat upward as shown in Figure 1. When, however, the slide moves forward, which occurs after a blank a has been carried forward far enough so that its rear edge is substantially beyond the nip of the roll 21 and discs or rolls 25, the moment that lug 43'leaves the stop 44, the spring acts upon the pin 41 of the hub 41 of the pushing blade, to swing the latter down to a substantially vertical position, as illustrated by dotted lines in Figure 1, the limit of such movement being determined by the stop pin with which the pin 41 would then contact.

Suitably mounted on the frame of the machine, is a cylindrical chamber 46, having a tangential slot 47 in position for the forward end of a blank a which is being pushed forward to enter the chamber so that as the strip or blank is completely advanced by the pushing blade 42, the said strip or blank will be guided by the inner wall of the chamberso as to be bent into a perfectcylindrical form, the length of the strip or blank, slightly exceeding the internal diameter of the cylindrical chamber so that the ends of the strip or blank will be overlapped when it has been completel bent to cylindrical form.

As has een described, the rear end of the strip has received glue across the surface of its rear edge. Therefore, when the blank has been completely bent to cylindrical form, its upper, glue carrying surface over-laps the upper surface of what was the forward end of the strip.

Mounted at 48, is a presser 49, having a rearwardly extending arm 50 to which is connected a link 51 which is operated by any suitable means to oscillate the presser 49 at the proper times. Such operation of the presser is so timed that the presser is in the upwardl swung position indicated by dotted lines in igure 1, when the blank is being fed through the slot 47. The under surface of the presser is curved practically concentrically with the wall of the chamber 46, thereby serving two purposes, namely, first, the curved under-surface acts as a guide for the forward edge of the blank, being pushed through the slot, and then, after the blank has been completely inserted in the cylindrical chamber and the ends over-lapped, the presser is actuateddownwardly. Its curved under-surface fits the over-lapping curved portions of the blank and assures uniform pressure over that glued area.

Referring now'to Figure 2, we illustrate at the right a standard 52, in which is reciprocally mounted the stem 53 Ma mandrel 54, said mandrel being preferably constructed so that it can be expanded. The mandrel is so mounted and actuated that it will enter the cylindrical chamber 46 either before or after the blank has been completely inserted in the cylindrical chamber.

At the left of Figure 2, we illustrate a standard 55 in which is reciprocally mounted the stem 56 of a plunger disc 57, the diameter of which is such as to enable it to enter one end of the cylindrical chamber as presently described. Preferably the plunger 57 has a rib or slight flange 58.

Suitab y supported by the frame of the machine, 1s a guide 59 in which the end discs I) are adapted to be fed at the proper times, so that one disc will arrive against a suitable stop 60 indicated by dotted lines in Figure 1 and in position so that when the plunger disc 57 is actuated to the right (Figure 2), it will force the disc 1) into the end of the cylindrically bent blank (1 in the chamber 46 (see Figure 6). To properly size the disc I) and bend its margin in a sort of a crimped manner, the end of the chamber 46 is provided with a suitable sizing guide 61. Of course the operation just described brings the margin of the disc into contact with the glue which has been applied along one edge of the bent blank (1.

It is to be understood of course, that when the plunger disc 57 operates as described, the mandrel 54 is in its extreme inner position in the cylindrical chamber 46, so that during the pushing action of the disc 57, the inner end of the mandrel 54 determines the distance to which the disc 5 can be pushed, while the ledge 54 of the mandrel 54 arrests the outer edge of the bent blank so that the bent blank itself is not pushed out of the cylindri cal chamber.

After the parts have been formed and assembled as described, the mandrel 54 retreats to its outward position as illustrated by Fi ure 2, and the stem 56 of the plunger disc is actuated so that said plunger disc will push the completed article out of the cylindrical chamber and towards the right so that it can drop on to any suitable delivery chute 62.

If the glue which has been applied as described is insuflicient to hold the disc b in place for all purposes to which the boxes are to be applied, any suitable crimpin im lement or mechanism may be emp o e to crimp the margins of the discs and t e surrounding edges of the tubes together,

Having now described our invention, we claim 1. In a machine of the character described, a hollow normally empty former having an opening, and means for pushing a blank through said opening to cause it to automatically partake of the shape of the inner wall of said former.

2. In a machine of the character described, a forming member having a cylindrical wall provided with a slot, and means for pushing a blank completely through said slot to cause it to automatically bend to cylindrical form.

3. In a machine of the character described, a hollow former having an opening, means for pushing a blank of the proper length completely through said opening to cause it to automatically partake of the shape of the inner wall of the former, and means for securing the end ortions of the blank together.

4. In a machlne of the character described, a hollow former having an opening, means for pushing a blank of the proper length completely throu h said'opening to cause it to conform to the shape of the inner wall of the former with the ends of the blank overlapped, means for applying adhesive to an end portion of the blank on its way to the former, and means for pressing the overlapped ends together.

5. The combination with a cylindrical chamber having a slot, of means for pushing blanks successively completely through said slot to cause them to automatically bend to cylindrical form with overlapped ends, and means for pl ing end pieces in the bent blanks while i lf said chamber. 7

6. The combination substantially as specified by claim 5, a mandrel being provided with means to determine the inward location of said end pieces.

.7. The combination with a cylindrical chamber having a slot, of a'mandrel movable into and from one end of the chamber, a plunger movable to and from position inside the other end of the chamber, means for pushing a blank through the slot of the chamber to cause it to bend to cylindrical form with overlapped ends, and means for locating a plunger applying adhesive to the blank to effect ads hesion of the overlapped ends of the blank and of the margin 0 the inserted disc.

In testimony whereof we have aifixed our signatures.

LEON E. LA BOMBARD. MELVINI-I. SIDEBOTHAM. 

